caa a22 4500 467886083 CHVBK 20180406152734.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s10021-005-0110-x doi (NATIONALLICENCE)springer-10.1007/s10021-005-0110-x Global Distributions of Arbuscular Mycorrhizal Fungi [Elektronische Daten] [Kathleen Treseder, Alison Cross] We examined potential large-scale controls over the distribution of arbuscular mycorrhizal (AM) fungi and their host plants. Specifically, we tested the hypothesis that AM fungi should be more prevalent in biomes where nutrients are primarily present in mineral, and not organic, forms. Values of percentage root length colonized (%RLC) by AM fungi, AM abundance, and host plant availability were compiled or calculated from published studies to determine biome-level means. Altogether, 151 geographic locations and nine biomes were represented. Percent RLC differed marginally significantly among biomes and was greatest in savannas. AM abundance (defined as total standing root length colonized by AM fungi) varied 63-fold, with lowest values in boreal forests and highest values in temperate grasslands. Biomes did not differ significantly in the percentage of plant species that host AM fungi, averaging 75%. Contrary to the hypothesis, %RLC, AM abundance, and host plant availability were not related to the size, influx, or turnover rate of soil organic matter pools. Instead, AM abundance was positively correlated with standing stocks of fine roots. The global pool of AM biomass within roots might approach 1.4 Pg dry weight. We note that regions harboring the largest stocks of AM fungi are also particularly vulnerable to anthropogenic nitrogen deposition, which could potentially alter global distributions of AM fungi in the near future. Springer Science+Business Media, Inc., 2006 arbscular mycorrhizal fungi nationallicence belowground net primary productivity nationallicence fungal biomass nationallicence biome nationallicence colonization nationallicence fine root length nationallicence root C:N ratio nationallicence soil organic matter nationallicence survey nationallicence Treseder Kathleen Department of Biology, University of Pennsylvania, 19104, Philadelphia, Pennsylvania, USA aut Cross Alison Department of Biology, University of Pennsylvania, 19104, Philadelphia, Pennsylvania, USA aut Ecosystems Springer-Verlag; www.springer-ny.com 9/2(2006-03-01), 305-316 1432-9840 9:2<305 2006 9 10021 https://doi.org/10.1007/s10021-005-0110-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-005-0110-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Treseder Kathleen Department of Biology, University of Pennsylvania, 19104, Philadelphia, Pennsylvania, USA aut NATIONALLICENCE 700 1- Cross Alison Department of Biology, University of Pennsylvania, 19104, Philadelphia, Pennsylvania, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag; www.springer-ny.com 9/2(2006-03-01), 305-316 1432-9840 9:2<305 2006 9 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer